Final answer:
Current research has shown that most discriminatory behavior is the result of ingroup favoritism. The correct option is (a).
Step-by-step explanation:
Current research has shown that most discriminatory behavior is the result of ingroup favoritism. In-group bias, which is a preference for our own group over other groups, can result in prejudice and discrimination towards out-groups. This means that people often show more positive thoughts, feelings, and behaviors towards individuals who are similar to themselves, such as those who share the same gender, race, or favorite sports team.